<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>input</title>
    <style>

        .form-input {
            background: transparent;
            box-shadow: none;
            font-size: 20px;
            color: #fff;
            margin-left: 5px;
            margin-right: 5px;
        }

        .form-input:focus {
            border: 1px solid blue;
        }

        .form-inline {
            display: flex;
            width: 100%;
            padding: 6px 6px;
            margin-top: 10px;
        }

        .form-inline label {
            font-size: 20px;
        }

        .input-inline select {
            font-size: 20px;
        }

    </style>
</head>
<body>
<input type="text" placeholder="请输入内容" class="form-input" />

<div class="form-inline">
    <label>姓名</label>
    <div class="input-inline">
        <input type="text" placeholder="请输入姓名" class="form-input" />
    </div>
    <label>姓名</label>
    <div class="input-inline">
        <input type="text" placeholder="请输入姓名" class="form-input" />
    </div>
    <label>行业</label>
    <div class="input-inline">
        <select>
            <option>1</option>
            <option>2</option>
            <option>3</option>
        </select>
    </div>
</div>
</body>
</html>